EP0880130A3 - Optical disk having increased erasure efficiency - Google Patents

Optical disk having increased erasure efficiency Download PDF

Info

Publication number
EP0880130A3
EP0880130A3 EP98303960A EP98303960A EP0880130A3 EP 0880130 A3 EP0880130 A3 EP 0880130A3 EP 98303960 A EP98303960 A EP 98303960A EP 98303960 A EP98303960 A EP 98303960A EP 0880130 A3 EP0880130 A3 EP 0880130A3
Authority
EP
European Patent Office
Prior art keywords
groove
optical disk
portions
moreover
phase change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98303960A
Other languages
German (de)
French (fr)
Other versions
EP0880130A2 (en
Inventor
Madoka c/o Nikon Corporation Nishiyama
Seiji c/o Nikon Corporation Morita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Publication of EP0880130A2 publication Critical patent/EP0880130A2/en
Publication of EP0880130A3 publication Critical patent/EP0880130A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24076—Cross sectional shape in the radial direction of a disc, e.g. asymmetrical cross sectional shape
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24079—Width or depth
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0055—Erasing
    • G11B7/00557—Erasing involving phase-change media
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/006—Overwriting

Abstract

A phase change type optical disk in which recording is performed in land portions and groove portions, and which eliminates the detrimental effects of narrowing of the track pitch. The optical disk includes a disk substrate having a refractive index n and performs recording in land portions and in groove portions using a phase change between amorphous and crystalline, with an illuminating light having wavelength λ. A groove depth, which is the difference in level between a land portion and a groove portion, is limited in the range of numerical values of λ/(3.78n) or greater. Moreover, the groove depth may be set to any value close to λ/(3n), {λ/(3n) + λ/(2n)}, {λ/(6n) + λ/(2n)}. Furthermore, while the groove depth is made deep, the roughness width of the groove sidewalls is kept to 50 nm or less, or to 20 nm or less. Moreover, the taper angle of the groove sidewalls is set at 60° or more, 80° or more, or 84° or more.
EP98303960A 1997-05-19 1998-05-19 Optical disk having increased erasure efficiency Withdrawn EP0880130A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP12863897 1997-05-19
JP9128638A JPH10320835A (en) 1997-05-19 1997-05-19 Optical disk
JP128638/97 1997-05-19

Publications (2)

Publication Number Publication Date
EP0880130A2 EP0880130A2 (en) 1998-11-25
EP0880130A3 true EP0880130A3 (en) 2001-02-14

Family

ID=14989775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98303960A Withdrawn EP0880130A3 (en) 1997-05-19 1998-05-19 Optical disk having increased erasure efficiency

Country Status (3)

Country Link
US (1) US20010012265A1 (en)
EP (1) EP0880130A3 (en)
JP (1) JPH10320835A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100561382B1 (en) * 1999-03-25 2006-03-16 삼성전자주식회사 Substrate of optical disk
JP3104699B1 (en) 1999-06-01 2000-10-30 株式会社ニコン Manufacturing method of molded substrate with fine grooves
JP2001243665A (en) * 1999-11-26 2001-09-07 Canon Inc Stamper for formation of optical disk substrate and its manufacturing method
JP2002050090A (en) * 2000-05-25 2002-02-15 Fujitsu Ltd Optical recording medium
WO2002029787A1 (en) * 2000-09-29 2002-04-11 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and method of reproducing the record
ATE453911T1 (en) * 2000-10-03 2010-01-15 Panasonic Corp MULTI-LAYER OPTICAL PLATE AND METHOD FOR PRODUCING THE MULTI-LAYER OPTICAL PLATE
JP2002251793A (en) * 2001-02-21 2002-09-06 Sony Corp Manufacturing method for master disk of optical recording medium
US7548505B2 (en) 2001-07-18 2009-06-16 Sony Corporation Optical recording medium having a relationship between groove width and track pitch
DE10310573A1 (en) * 2003-03-11 2004-09-30 Infineon Technologies Ag Non-volatile, integrated memory cell and method for writing or reading information into / from the memory cell
US20050152338A1 (en) * 2004-01-14 2005-07-14 Chen Christopher Y.W. System and method for managing voice communications between a telephone, a circuit switching network and/or a packet switching network
US7920458B2 (en) * 2005-04-27 2011-04-05 Ricoh Company, Ltd. Optical recording medium, and recording and reproducing method

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008543A1 (en) * 1978-08-28 1980-03-05 Discovision Associates Method for moulding a videodisc composition
US4797316A (en) * 1986-12-23 1989-01-10 Glaverbel Etched glass and process of manufacturing same
EP0414966A1 (en) * 1988-07-08 1991-03-06 Minnesota Mining And Manufacturing Company Optical disc recording medium having a microstructure-derived inhomogeneity or anisotropy
US5008176A (en) * 1987-09-29 1991-04-16 Victor Company Of Japan, Ltd. Information recording medium having a glass substrate
US5115424A (en) * 1988-01-22 1992-05-19 Mitsubishi Denki Kabushiki Kaisha Optical storage medium with provision for limitation of thermal conduction
US5353277A (en) * 1991-10-14 1994-10-04 Sony Corporation Optical disk having intertrack heat conduction suppression
EP0626679A2 (en) * 1993-05-26 1994-11-30 Matsushita Electric Industrial Co., Ltd. Optical information recording media and optical information read/write device
US5477526A (en) * 1993-03-10 1995-12-19 Matsushita Electric Industrial Co., Ltd. Optical disk substrate and optical disk employing said optical disk substrate
US5493561A (en) * 1992-06-17 1996-02-20 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and information recording and reproducing method thereof
JPH08147761A (en) * 1994-11-21 1996-06-07 Nikon Corp Information recording medium
US5530641A (en) * 1991-05-17 1996-06-25 Olympus Optical Co., Ltd. Optical recording medium having grooves and lands and/or plural pit lines, and reproducing apparatus therefor
US5561089A (en) * 1994-04-28 1996-10-01 Kabushiki Kaisya Ohara Glass-ceramic for information recording disk
EP0737967A2 (en) * 1995-03-28 1996-10-16 Toray Industries, Inc. Optical recording media and a method for recording on the optical recording media
EP0751505A2 (en) * 1995-06-27 1997-01-02 Kabushiki Kaisha Toshiba Optical information-recording medium
JPH0935334A (en) * 1995-07-12 1997-02-07 Nikon Corp Optical disk and method for accessing optical disk
EP0867873A2 (en) * 1997-03-25 1998-09-30 Sony Corporation Optical recording medium and optical disk apparatus

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008543A1 (en) * 1978-08-28 1980-03-05 Discovision Associates Method for moulding a videodisc composition
US4797316A (en) * 1986-12-23 1989-01-10 Glaverbel Etched glass and process of manufacturing same
US5008176A (en) * 1987-09-29 1991-04-16 Victor Company Of Japan, Ltd. Information recording medium having a glass substrate
US5115424A (en) * 1988-01-22 1992-05-19 Mitsubishi Denki Kabushiki Kaisha Optical storage medium with provision for limitation of thermal conduction
EP0414966A1 (en) * 1988-07-08 1991-03-06 Minnesota Mining And Manufacturing Company Optical disc recording medium having a microstructure-derived inhomogeneity or anisotropy
US5530641A (en) * 1991-05-17 1996-06-25 Olympus Optical Co., Ltd. Optical recording medium having grooves and lands and/or plural pit lines, and reproducing apparatus therefor
US5353277A (en) * 1991-10-14 1994-10-04 Sony Corporation Optical disk having intertrack heat conduction suppression
US5493561A (en) * 1992-06-17 1996-02-20 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and information recording and reproducing method thereof
US5477526A (en) * 1993-03-10 1995-12-19 Matsushita Electric Industrial Co., Ltd. Optical disk substrate and optical disk employing said optical disk substrate
EP0626679A2 (en) * 1993-05-26 1994-11-30 Matsushita Electric Industrial Co., Ltd. Optical information recording media and optical information read/write device
US5561089A (en) * 1994-04-28 1996-10-01 Kabushiki Kaisya Ohara Glass-ceramic for information recording disk
JPH08147761A (en) * 1994-11-21 1996-06-07 Nikon Corp Information recording medium
US5636201A (en) * 1994-11-21 1997-06-03 Nikon Corporation Optical disk memory for recording reproducible information
EP0737967A2 (en) * 1995-03-28 1996-10-16 Toray Industries, Inc. Optical recording media and a method for recording on the optical recording media
EP0751505A2 (en) * 1995-06-27 1997-01-02 Kabushiki Kaisha Toshiba Optical information-recording medium
JPH0935334A (en) * 1995-07-12 1997-02-07 Nikon Corp Optical disk and method for accessing optical disk
EP0867873A2 (en) * 1997-03-25 1998-09-30 Sony Corporation Optical recording medium and optical disk apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 06 30 June 1997 (1997-06-30) *

Also Published As

Publication number Publication date
US20010012265A1 (en) 2001-08-09
JPH10320835A (en) 1998-12-04
EP0880130A2 (en) 1998-11-25

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